NCERT Solutions for Class 8 Science Chapter 6 Reproduction in Animals
Page No. 76 Exercise Question 2.
8th Science Chapter 6 Reproduction in Animals
NCERT Academic Session 2023-2024
CBSE Board and Others state Board
Description:
Human reproduction involves sexual reproduction between male and female. Sperm from the male fertilizes the egg in the female’s reproductive system. After fertilization, the embryo develops in the uterus during pregnancy and is born through the vagina in childbirth, ensuring the continuation of the species.
4. Fertilization:
– If a sperm successfully penetrates the egg’s protective layer (zona pellucida), fertilization occurs.
– This union forms a zygote, merging genetic material from the sperm and egg.
5. Zygote Development:
– The zygote rapidly divides and forms a cluster of cells known as a blastocyst.
6. Implantation:
– The blastocyst moves to the uterus and attaches to the uterine lining in a process called implantation.
7. Embryo Formation:
– Following implantation, the embryo grows and differentiates, forming specialized cells and tissues.
8. Supportive Systems:
– The placenta and umbilical cord develop, providing nourishment and oxygen to the growing fetus from the mother’s bloodstream.
9. Progression to Birth:
– Continuous growth of the fetus within the womb leads to childbirth, marking the end of pregnancy and the beginning of a new life.